Objective To investigate the relationship of power and exposure period of 980 nm continuous laser system on the surface sterilization for metal medical equipment. Methods The sterile steel lancets were artificially contaminated with Staphylococcus aureus and Escherichia coli,respectively. These lancets were exposed and disinfected by 980 nm continuous laser at different powers for different time periods.The inactivation of the bacteria on each lancet was observed and measured by 8-hour enrichment culture.Re...